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Supports: TIFF, TIF
1/30s (single frame at 30fps) or 1/24s (single frame at 24fps) for cinematic playback, or 1 to 10 seconds per frame for slideshow pacing. The default is 5 seconds per frame.TIFF (Tagged Image File Format, created at Aldus in 1986 and now stewarded by Adobe) is the archival image format of choice — lossless compression, up to 16-bit per channel, RGB / CMYK / YCbCr color models, and multi-page support. RMVB (RealMedia Variable Bitrate, released by RealNetworks in 2003) is a video container that uses variable bitrate encoding to produce noticeably smaller files than constant-bitrate alternatives at equal quality. Converting a TIFF sequence to RMVB packs a stack of archival frames into a single small, playable video. Common reasons:
| Property | TIFF | RMVB |
|---|---|---|
| Media type | Raster image (single or multi-page) | Video container with VBR-encoded video + audio |
| Year introduced | 1986 (Aldus / Adobe) | 2003 (RealNetworks) |
| Compression | Lossless by default (LZW, Deflate, PackBits); optional lossy JPEG | Lossy video (RealVideo RV10/20/30/40); lossy audio (RealAudio Cook / RA) |
| Color depth | 1, 4, 8, 16, 32 bits per channel; RGB / CMYK / YCbCr / grayscale | 8-bit per channel YCbCr 4:2:0 (typical) |
| Max file size | ~4 GB classic TIFF; up to 18 EB with BigTIFF | No hard cap; practical limit depends on player |
| Plays in browsers | No (download only) | No native browser playback |
| Native players | Image viewers, Photoshop, GIMP, ImageJ | VLC, RealPlayer, MPlayer, Media Player Classic |
| Typical use | Archival, scanning, scientific imaging, prepress | Asia-region video archives, RealPlayer ecosystems |
RMVB containers can carry any of four RealVideo codec generations. xconvert defaults to RV10 for maximum player compatibility; choose a newer generation under Advanced Options → Video Codec only if you know your player supports it.
| Codec | Shipped with | Based on | When to pick |
|---|---|---|---|
| RV10 (RealVideo 1.0) | RealPlayer 5 (1997-era) | H.263 | Maximum compatibility with old RealPlayer installs and Real Alternative codec packs. xconvert default. |
| RV20 (RealVideo G2) | RealPlayer 6 | H.263 (with Scalable Video Technology) | Better quality than RV10 at similar bitrates; still very compatible. |
| RV30 (RealVideo 8) | RealPlayer 8 | Early-draft H.264 | Stronger compression — useful when file size matters more than legacy playback. |
| RV40 (RealVideo 9/10) | RealPlayer 9 | H.264-style | Best quality-per-bit in the RealVideo family; needs a relatively modern Real-compatible player. |
If your TIFF frames came out of a 3D renderer or compositor (Blender, After Effects, Houdini, Nuke), pick the value matching the original timeline. 1/24s (single frame at 24fps) is cinematic; 1/30s is broadcast / web standard; 1/60s is smooth-motion / high-frame-rate. For scans, microscopy stacks, or slideshow content where each TIFF is meant to dwell on screen, use 1-10 seconds per frame instead.
RV10 (RealVideo 1.0) is the safest codec for RMVB — every player that supports RMVB at all supports RV10, including older RealPlayer installs and the Real Alternative codec pack. Newer generations (RV30, RV40) compress better but break in some legacy players. If file size matters more than legacy playback, switch the Video Codec to RV40 under Advanced Options.
Almost always, by orders of magnitude. A 100-frame stack of 1080p uncompressed TIFFs can total 600+ MB; the equivalent RMVB at "Very High" quality typically lands between 5 and 50 MB depending on motion content. RealMedia's variable-bitrate encoding is part of why — bitrate rises only when frame-to-frame motion demands it. The trade-off is that RMVB is lossy, so the conversion is one-way for archival purposes (keep the TIFFs).
Yes, but not out of the box. macOS QuickTime and Windows Media Player do not bundle RealMedia codecs. Install VLC media player (free, cross-platform, plays RMVB natively) or RealPlayer. If RMVB compatibility is a problem for your audience, consider converting your TIFF sequence to MP4 instead via TIFF to MP4 — MP4 plays everywhere without extra codecs.
By filename, sorted lexicographically. The standard renderer convention name_0001.tif, name_0002.tif,... orders correctly. Watch out for unpadded numbering (frame_1.tif, frame_2.tif,..., frame_10.tif) — that puts frame_10 before frame_2. Rename with zero-padding (or use a batch-rename tool) before uploading.
Yes. A multi-page TIFF (the spec calls them "subfiles") is unpacked into individual frames in page order, then sequenced into the RMVB at the Image Duration you chose. This is useful for fax / scan archives or ImageJ stacks that already bundle many images into one.tif file.
No — RMVB's RealVideo codecs encode 8-bit-per-channel YCbCr 4:2:0, the same as most consumer video. If your TIFFs are 16-bit (microscopy, medical imaging, HDR renders), the extra precision is downsampled to 8-bit during conversion. Keep the original TIFFs as your master; the RMVB is a viewing/distribution copy.
Yes — for one big merged video, drop all frames in and pick "Merge images". For multiple short clips, organize frames into separate uploads or set Merge strategy to "Video per image" to produce one RMVB per input file. If you instead need each TIFF compressed individually as an image, see compress TIFF; if you've already got an RMVB and want a modern container, see RMVB to MP4.